Question

If the air is maintained at ${30}^o$C and the temperature of the body cools from ${80}^o$ C to ${60}^o$ C in $12$ minutes, find the temperature of the body after $24$ minutes.

Answer 1

Change in temperature in $1$ minute = $\frac{20}{12}{}^{\circ }C$

Change in temperature in $24$ minute = $\frac{20\times 24}{12}{}^{\circ }C={40}^{\circ }C$

Hence, the temperature, $80-40={40}^{\circ }C$